Today the Sears Tower offically became the Willis Tower
(July 15) - Chicago is saying goodbye to one of its most famous landmarks, the Sears Tower. Beginning Thursday, the 110-story skyscraper will have a new name.
The structure's new name is the Willis Tower, after Willis Groups Holdings, an insurance brokerage based in London. The company is leasing 140,000 square feet in the tower for 500 employees, The Associated Press reported Wednesday. The tower is actually owned by a real estate consortium